Question: (2) A uniform point source has a total luminous output of 50,000 lumens. Calculate i. the Illuminance (E) at point B'on a horizontal desk?

(2) A uniform point source has a total luminous output of 50,000

(2) A uniform point source has a total luminous output of 50,000 lumens. Calculate i. the Illuminance (E) at point B'on a horizontal desk? ii. the Illuminance (E) and luminance (L) at point 'C' on a wall that has a diffuse reflectance of 60% Isotropic Source 50,000 Im B 10 ft. 8 ft. 10 ft. 8 ft.

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